The more you knead and stretch the mixture, the more it will form into slime. If adding extra baking soda or contact lens solution, do so in small increments as a little bit will go a long way, and you may be closer to achieving play-ready slime than you think. ALSO, if you end up with a little glue stuck in the bottle, prop it upside down on the counter for a few minutes. You’d be surprised how much glue you can eke out of those last drops.
Find it online: https://www.spiritedandthensome.com/homemade-easy-slime-recipe/